@article{9465,
  author = {Carl Hansen and W. Spangenberg},
  title = {Equilibrium and Pulsational Properties of the Lower Helium Main Sequence},
  year = {1971},
  journal = {The Astrophysical Journal},
  volume = {168},
  pages = {71},
  month = {Jan-09-1971},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1971ApJ...168...71H},
  doi = {10.1086/151062},
}